CVE-2026-12071 TeamDavid: Header Injection leading to Open Redirect via URL-encoded characters
Attackers can redirect users to malicious domains or inject headers via URL-encoded characters in TeamDavid Webbox redirects.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-12071?
CVE-2026-12071 is a medium-severity vulnerability in Tobit Laboratories AG TeamDavid, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
The Webbox of TeamDavid by Tobit Laboratories AG constructs redirect URLs using user-supplied input, which is appended to the redirect target in a 302 HTTP response. By using URL-encoded characters such as “%2e” (representing a dot), an attacker can manipulate the portion of the URL following the top-level domain (TLD). If a similar, registerable TLD exists (for example, if “.com” is the application’s domain, and “.company” is available for registration), an attacker can craft a URL to redirect users to a malicious “.company” domain. By using URL-encoded line feeds, it becomes possible to insert arbitrary response headers in the server's HTTP response.
This issue affects TeamDavid before Rollout 528.
Starting with Rollout 528 (June 30, 2026), the affected functionality is disabled by default and the vulnerabilities are therefore no longer exposed through this functionality.
Weakness: CWE-601
Which versions are affected by CVE-2026-12071?
How do I fix CVE-2026-12071?
No fix has been published for CVE-2026-12071 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-12071 being exploited?
There is no known exploitation of CVE-2026-12071 in the wild and no public exploit code.
Sources
Also known as GHSA-jrwc-g36x-gqc7.